This is the code for a Chrome extension that helps you preview
how fonts from the Google Fonts API look on existing webpages.

The "testing" process is:
- Open a webpage, try to apply a font, try to change the style, try to apply
a different font, try to reset, try to apply another.
- Good webpages are: http://en.wikipedia.org/wiki/Fox (Basics)
                     http://www.mysparebrain.com/svgjs (Tests SVG issue)

If you have ideas for improvements, please send a pull request.